Tool



Nov. 31925.

E. L. SLAGHT, JR.,ET AL TOOL Filed March 26. 1925 WEDGE mvzn'rons w ms Q Q ATTDRNEY i :1 I An Patented. Nevi- 35, that? I STATES PATENT OFFICE.

EDWARD L. SLAGI-I'l, J'R., AND WELLIAM FROST, OF EaAN JOSE, CALIFORNIA. i

TOOL.

Application filed March 26, 1925. Serial No. 18,479.

To aZZ whom it may concern.

Be it known that we, EDWARD L. SLAGH'I, J12, and lViLLi-Mi Fuoe'r, citizens of the United States, and residents of San Jose, in the county of Santa Clara and State of California, have invented certain new and useful ln'iprovements in Tools, of which the following is a specification.

This invention relates particularly to a. tool for use in removing the pin from a valve stem, and for replacing the same therein.

In performing certain operations upon an internal combustion engine it is frequent ly necessary to remove the valves therefrom. To accomplish this the spring must be removed from the valve stem, and since one end of the spring engages a pin set in the valve stem it is necessary that the said pin be first removed.

This removal of the pin in the valve stem is ordinarily a somewhat difi'icult operation to perform because it must be reached from the exterior of the engine casing through a comparatively small opening which renders it difficult of access with ordinary tools.

It is one object of the invention to provide a tool so constructed and operated as to be readily applied to the valve stem pin through even a small opening in the eugine whereby to remove the pin from the valve stem, and so constructed and operated as to readily replace the pin in the stem when desired.

It is another object to provide a tool of the character indicated so constructed as to quickly replace the pin in the valve stem in its proper position, that is, extend ing the desired distance both sides of the stem.

It is another object to provide a means for rotating the valve stem at distance whereby to render the pin more easily accessible from the exterior of the engine.

in the drawing Figure 1 is a longitudinal section through a tool embodying our invention.

Figure 2 is a frontend elevation of the tool.

Figure 3 is a side elevation of the forward end of the tool applied to a valve to rotate the same, a portion of the valve stem being broken away.

Figured is a side elevation of the for ward end of the tool inverted and applied Referring more particularly to the drawing, we show at 1 a casing of; sheet metal having the general conformation of a pieto l, 2 indicating the barrel and 8 the handle or grip.

ln casing '1 is a trigger 4 pivotally moun ed therein as at 5 near its upper edge and projecting through opening 6 in the lower side as shown. The trigger t is normally held in an advanced position against edge 7 of opening 6 by means of a leaf spring 8 set in slot 9 in its rear edge and engaging the rear inner surface of grip 3.

The barrel 2 is in the present case made rectangular in transverse cross-section, and has its lower side projected forwardly a distance as at 10, the portion 10 being curved upwardly a distance on both side edges to form a finger that is substantially triangular in transverse crossrsection'.

A distance back from; the end of the tinger 10- is a lug 11, in the present case shown as punched up out of the finger 10. At 12 we show a strip of sheet metal slidably mounted in barrel 2 in parallel relation to its bottom side and twisted at one end as at 13 to engage a slot 1% in trigger it to which it is secured by a rivet 15. The other end of strip 12 projects from the front end of barrel 2 to form a finger 16 curved downwardly on its side edges. to engage and slide upon the upper side of finger 10 as shown, and slightly bevelled or upturned on its front, edge as at 17. l Vhen the trigger 4 is in its normal position the end of finger 16 is flush with the end of finger 10. The finger 16 is maintained in contact with the finger 10 by means of a leaf spring 18 mounted upon the upper side of strip 12 and curved upwardly to engage the top of barrel 2 and thence downwardly to engage strip 12 again.

At spaced points on the upper surface of barrel 2 are positioned lugs 1919 adapted to engage the two recesses 2020 in the top of a valve 21. On the lower surface of barrel 2 is positioned a rib 22 adapted to en- Evil gage the groove 23 in the top of a valve 24, some valves having spaced recesses and others grooves as shown in Figures and 3.

In using the device it is necessary to first so position the valve stem that the tool can be brought into alignment with the pin 25 therein. In the case of the type of valve shown in Figure 4; this is accomplishedby inserting lugs 19 in recesses 20 and rotating the tool in a horizontal plane until the pin 25 is in the position desired. It the valve has a groove 23 in its surface then the rib 22 is inserted therein and the tool rotated in a horizontal plane until the pin is in the right position.

After compressing the spring :26 in any suitable manner the tool is grasped in the hand and the trigger 4 retracted, thereby withdrawing finger 16 of strip '12 past the lug 11 in finger 10. The tool is now presented to the pin 25 with the finger 10 en gaging its under side, whereupon the trigger is released thereby permitting linger 16 to pass over the upper side of the pin so that it is clasped between the two opposing fingers 10 and 16 and is readily withdrawn by withdrawing the entire tool.

In replacing the pin the action is reversed. That is, the pin 25 is placed between fingers 10 and 16 with one end engaging lug 11. This lug 11 forms a stop and is so positioned that when the pin 25 is placed in the valve stem it projects equal distances on both sides thereof. When the pin is in position the trigger 4: is again operated and finger l6 retracted and the pin released.

Since pins of various length are used in valve structures of difiierent makes and sizes, the lug 11 may be made adjust-able as shown in Figure 6 by providing a slot 27 in lingo: l0 and placing a small bolt 28 therein.

It is to be understood, of course, that while we have herein shown and described but one embodiment of the invention, changes in form, construction, size and method of operation may be made within the scope of the appended claims.

1. A tool of the character described, comprising an elongated body portion having a pin engaging finger formed thereon, an elementslidably mounted thereon and provided with a finger arranged to cooperate with said first mentioned linger to grasp a pin, means for urging said fingers together, and means for slidably moving one finger relative to the other.

2. A tool of the character indicated, comprising an elongated body portion having apin engaging finger formed thereon and a stop positioned'on said linger, an element slidably mounted thereon and provided with a linger arranged to cooperate with said first mentioned finger to grasp a pin, means for urging said fingers together, and means for slidably moving one finger relative to the other 3. A tool of the character described, com prising an elongated body portion provided with a handle at one end and a projecting finger at the other end, said finger having upturned side edges and having a stop positioned therein a distance from its end, a trigger pivotally and resiliently mounted thereon adjacent to said handle, an element slidably mounted on said body portion and connected to said trigger and provided with a finger having downwardly turned side edges and normally lying in opposed relation to said first finger, and means for urging said fingers together.

EDWARD L. SLAGHT, Jn.

WILLIAM FROST. 

